The development of appropriate scenarios is critical in high-fidelity simulation training. They need to be developed to address specific learning objectives, while not preventing other learning points from emerging. Buying a patient simulator, finding a volunteer to act as the patient, or even obtaining ready-made scenarios from another simulation center are rarely insurmountable challenges. The issue often lies in how to use or adapt these for your own purpose: with your team, facilities, and resources but primarily for your learners. Published information is limited in the area of scenario preparation for health care education and continuing medical education or continuing professional development. This article is a guide for clinical tutors, standardized patient trainers, and patient simulator operators on how to script scenarios and proposes a new detailed and reusable template for writing scenarios. It contains practical sections such as how to decide on the learning objectives to be addressed, how to script and organize your scenarios, and how to pitch the suitable level of details to make the scenarios appropriately realistic. (Contains 1 table and 2 figures.)